<!DOCTYPE html>
<html>
<head>
<!-- idea and code swiped from
http://assorted.svn.sourceforge.net/viewvc/assorted/real-time-plotter/trunk/src/rtp.html?view=markup -->
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.1/jquery.min.js"></script>
<script src="http://people.iola.dk/olau/flot/jquery.flot.js"></script>
<script>
window.onload = function() {
    var data = {};
    var s = new WebSocket("ws://%(HTTP_HOST)s/data");
    s.onopen = function() {
        //alert('open');
        s.send('hi');
    };
    s.onmessage = function(e) {
      //alert('got ' + e.data);
      var lines = e.data.split('\n');
      for (var i = 0; i < lines.length - 1; i++) {
        var parts = lines[i].split(' ');
        var d = parts[0], x = parseFloat(parts[1]), y = parseFloat(parts[2]);
        if (!(d in data)) data[d] = [];
        data[d].push([x,y]);
      }
      var plots = [];
      for (var d in data) plots.push( { data: data[d].slice(data[d].length - 200) } );
      $.plot( $("#holder"), plots,
              {
                series: {
                  lines: { show: true, fill: true },
                },
                yaxis: { min: 0 },
              } );

      s.send('');
    };
};
</script>
</head>
<body>
<h3>Plot</h3>
<div id="holder" style="width:600px;height:300px"></div>
</body>
</html>
